/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchyDefines.h
[EControlRigContextChannelToKey](API\Plugins\ControlRig\Rigs\EControlRigContextChannelToKey) & operator&= ( [EControlRigContextChannelToKey](API\Plugins\ControlRig\Rigs\EControlRigContextChannelToKey) & Lhs, [EControlRigContextChannelToKey](API\Plugins\ControlRig\Rigs\EControlRigContextChannelToKey) Rhs )